Window lock



J. A. MUSSMAN Dec. 24, 1940.

WINDOW LOCK Filed Sept. 2'7, 1938 2 Sheets-Sheet 1 E m! I.

Filed Sept. 27. 1938 A. MUSSMAN WINDOW LOCK '2 Sheets-Sheet v22 PatentedDec. 24, 1940 UNITED STATES PATENT. OFFlCE. 2,226,a4s p wINnowLooK JacobA. Mussman, Portsmouth, Va. Application september 27, 1938, Serial No.231,965

8 Claims.

This invention relates to improvements in window locks, particularly forthe most commonly known type of window which comprises bottom and topsashes. Persons who are in the habit of lowering the top sash forventilation often lay themselves open to the entry of thieves into theroom because of the lack of means to secure the bottom sash. The samedanger accompanies the iaising of the bottom sash. 0 One of theoutstanding principles of the invention is concerned with making itpossible for a person to either raise the bottom sash or lower the topsash for the purpose of ventilation, or to both raise and lower the twosashes for the maintenance of a circulation of air and to do this withthe utmost safety. With this preamble in mind, the objects of theinvention are as follows:

First, to provide a window lock which is adapted to secure the bottomand top sashes of a window in both open and closed positions,. and insuch a relative adjustment that ventilation can be had without thedanger of an unwanted person making an unlawful entry into the room.

Second, to provide a window lock with which the bottom and top sashescan be secured together and yet be slidable in the window frame. Otherobjects and advantages will appear in the following specification,reference'beinghad toithe accompanying drawings in which:

Figure 1 is a front elevation of. a pair of window sashes illustratingthe applicationof theimproved window lock, a portion of the window framebeing shown in section.

Figure 2 is a sectional perspective view of the bottom and top sashes,together with a portion of the window frame, the invention beingillustrated more in detail.

Figure 3 is a vertical section on the line 33 of Fig. 2.

Figure 4 is a detailed cross section taken on the line 4-4 of Fig. 3.

Figure 5 is a horizontal section taken substantially on the line 5--5 ofFig. 3.

takensubstantially Figure 6 is a perspective view showingthe hasp andhinge plate of the lock swung up to more clearly illustrate the internalstructure.

Figure '7 is a detail perspective view of :the hinge leaf and knuckle towhich the hinge plate is secured.

Figure 8 is a detail plan view of the base. I Figure 9 is a crosssection taken on the line 9--9 of Fig. 8. v y

In Fig. 1 the bottom and top sashes are designated l and 2, the top railof the former being designated 3, and the left upright stiles of the twosashes being designated 4, 5. The window frame is only fractionallyshown at 6 and is here illustrated as being bored with a single hole "I.

Thewindow lock generally designated 9 (Fig. 2.) comprises two main partswhich are attached 5 to the respective stiles l, 5. The part it! oft-heformer, comprises what in effect is a rack. But unlike'an ordinarytoothed rack the projections I l are cross sectionally square. Thatis tosay, opposite sides are parallel :so that when the companion part of thewindow is set there will be no danger of a separation as would be thecase were the projections formed like ordinary rack teeth. The'rack l0comprises a strip of metal, as can be seen, so bentas to form theprojections l I. At this point it is desired to state that the use ofthe invention is not restricted to the specific type of projectionsshown. The later might be in the form of straight-sided studs or lugs ofvarims-configurations and it is believed that such an arrangement iseasily visualized without having-toadd an illustration. The rack II] issecured to the-stileB by screws IE or some appropriate equivalent. Thecompanion part of the window lock comprises the following structure; abase a generally designated l3, includes an apron l4 which is applied tothe front face of the stile 4 when the base is set on top of the railsand is th ur d by a plurality of screws l5. The 0 apron M has a keeperl6.

Thereis an extension I? of the apron 14 upward from the floor IQ of thebase (Figs. 3 and 9). The inner surface of this extension is eitherbeveled or rounded at I9 so that the resulting edge 3 5 is fairly sharp.This is not a cutting edge nor is it blunt. It is simply sharpened toconstitute a detent for the hasp (Fig. 3)

A depression 2| in the floor l8 (Figs. 3 and 9) provides a track for aslidable bolt 22. A pair of 5 0 spaced lugs 23, 24, wall the bolt in onone side, the upturned portion 25 of the floor i8 walling the bolt inonthe other side, said portion being formed into a stationary hingeknuckle 26 which overlies the bolt passage and completes the guid- '45ing arrangement therefor (Fig. 9). In addition to'securing the base I 3by'means of the screws l5, other screws 21 are driven into the windowsash through holes 28 in the floor It. The latter is I extended beyondthe apron It at 29 (Fig. 3) but thisex'tension'is cut out at 333 so asto match the rope slot ill in the bottom sash (Fig. 6).

An upstanding wall 32 provides a partial closure for one end of the basel3. This wall merges into I a circular enlargement 23 which matches anadjacent knuckle 26 in shape. The main purpose of this wall is to bracethe extension IT.

The previously mentioned bolt 22 has a knob 34 by which the bolt is slidback and forth on its track 2|. This knob works in the space between thelugs 23, 24 (Fig. 6) and these lugs limit the movement of the bolt tothe locking and unlocking positions. The knob is equipped with a stud 35which is adapted to enter and occupy either one of a pair of holes 36,31, in the leaf 38 (Fig. 7) of a hinge knuckle 39. When the knob 34abuts the lug 23 the stud 35 is in registration with the hole 36, andwhen it abuts the lug 24 the stud is in registration with the hole 31.

A pin 40 connects the hinge knuckles 26, 39. The hinge plate 4| of anarticulated locking member 42 is secured to the leaf 38 by rivets 43.The locking member includes the hasp 44, the hinge plate 4| and haspbeing joined by a hinge connection 45 as shown.

A slot 46 in the hasp 44 fits upon the keeper l6 when the locking member42 is swung down (Figs. 2 and 3). A look 47 is then applied to keep thelocking member in its locking position. The hasp 44 has at least onetang 48 struck up from it (two tangs being shown). These tangs define arecess 49 in which the extension I! is adapted to fit (dotted lines,Fig. 3) in order to support the locking member 42 in the bowed position.The reason for this provision is this:

It will be noticed that the hinge plate 4| is so secured to the leaf 38as to extend beyond the hinge 25, 39 (Fig. 3). This extension provides alocking element 5|] which is adapted to engage the space between aselected pair of the projections thus making said locking element arack-engaging part. The distance from the axis 5| of the hinge pin 40 tothe extremity 52 of the element 50 is such that when the locking member42 is set in its locking position (full lines, Fig. 3) the extremity 52will jam against the rack l0 and tighten both sashes against their guidestrips 53, 54 (Fig. 2). Thus the need for the detent 20 and recess 49will be understood. When moving either sash -it is necessary to get thelocking element 50 out of the way by standing and holding it in thedotted line position (Fig. 3).

The operation is readily understood. In Fig. 1 the hole 1 is of firstimportance. This hole is so bored into the window frame 6 that the bolt22 can be projected into it when the bottom sash is raised say sixinches from the sill. The bolt and hole are used only when it is desiredto make the total window opening more than six inches. For instance, ifit is desired to raise the bottom sash six inches and to lower the topsash six inches, use will be made of the bolt and hole to lock thebottom sash at the six inch level and the locking device 42 will be usedto lock the top sash six inches down. Otherwise it would be possible toraise the bottom sash a total of twelve inches, and this opening wouldbe large enough for an outsider to creep through.

But if the bottom opening is 6" and the top is not open at all, or thebottom is open 4" and the top 2", it is still unnecessary to use thebolt, for by raising both windows the total opening would still not bemore than 6". The bolt is not to be used for locking both sashes tight;the hinge plate and rack will do that. The rack is so designed and soplaced on the upper sash that the hinge plate will engage at exactly a6" opening of bottom window. The hole in the frame is also to be at thatpoint and so will the registrable markers on window frame and bottomsash. Another reason why the hole should not be below a 6" opening ofthe bottom sash is that it might run into the cut-out which is taken outwhen a new sash-cord is installed.

Provision is made of a pair of registrable markers 55, 56, respectivelyon the window frame and on the bottom sash'l (Fig. 2). It is possible tofeel when these markers are in registration without illuminating theroom and when they are the occupant can throw the bolt 22 so that itenters the hole 1 and secures the lower sash in the desired raisedposition.

The next act is to lower the top sash 2 if top ventilation is desired.If it is not desired then the locking member 42 can be manipulated tosecure both sashes, the rack I0 extending down to the cross rail of thetop sash.

In either case the turning of the locking member 42 from the dotted lineposition (Fig. 3) to the full line position will elevate the lockingelement 50 to its jamming position against the rack I 0. The hasp 44 islowered over the keeper l6 and the lock 41 is applied. Any possiblemovement of the top sash 2 is then limited to the distance between apair of the projections. The top sash cannot be moved beyond theselimitations, and the bottom sash cannot be moved at all, the engagementof the bolt 22 with the hole 1 preventing such movement.

It is not possible to shift the bolt 22 back while the parts are thuslocked, because when the hasp 44 is swung down, the stud 35 will enterthe hole 36 and thus lock the bolt. The bolt 22 also figures indirectlyin looking the two sashes in their fully closed positions. At such atime the bolt is retracted until the stud 35 registers with the hole 31.The locking member 42 is lowered and secured with the lock 41, andinasmuch as the element 5!] is then in engagement with the rack l0 it isimpossible to move either sash because it is intended that the element50 shall engage immediately below one of the projections I claim:

1. A look comprising a part attachable to one sash of a window, theother sash being adapted to have rack means substantially full lengththereof, said part consisting of locking means movable into lockingengagement with the frame in which the sashes are movable, and a unitaryjointed locking member also included in said part being foldable uponitself to both engage and secure the respective locking means in theframeengaging position and at the same time to engage said rack meansanywhere within its length to render both sashes substantiallystationary in any position of relative adjustment.

2. A look comprising a part attachable to one sash of a window, theother sash being adapted to have a rack, said part including a boltwhich is movable into locking engagement with the frame in which thesashes are movable, and a locking member also included in said otherpart being movable to secure the bolt in its frame-engaging position andat the same time over-reach the bolt to engage the rack at a selectedposition of adjustment of the respective sash thus to render both sashessubstantially stationary.

3. A look comprising a part attachable to one of a pair of sashes of awindow, said part including a bolt which is movable into lockingengagement with the frame in which the sashes are movable, a stud onsaid bolt, and a locking member included in said part being movable tofit down over the stud to hold the bolt in its frame-engaging positionand at the same time reach across to jam against the other sash thus torender both sashes substantially stationary.

4. A look comprising a part attachable to one of a pair of sashes of awindow, said part comprising a base, a bolt slidable on the base intolooking engagement with the frame in which the sashes are movable, and alocking member included in said part, having two hinged portions, one ofsaid portions being adapted to grip and hold the bolt in itsframe-engaging position, the other portion comprising a hasp to jamagainst the sash.

5. A lock comprising a part attachable to one of a pair of sashes of awindow, said art including a base having a depression and adjacentlyupstanding spaced lugs and another upstanding portion forming a bolttrack, a bolt slidable in said track into locking engagement with theframe in which the sashes are movable, said bolt having a knob workingin the space between the adjacently upstanding lugs and said knob havinga stud, a leaf hinged to said other upstanding portion, having a hole toreceive the stud when said leaf is swung toward the bolt thus to securethe bolt in its frame-engaging position, and a hasp hingedly carried bythe leaf being then jammed against said other sash thus to render bothsashes substantially stationary.

6. A look comprising a part attachable to one of a pair of sashes of awindow, said part including a base with a detent, a bolt slidablycarried by said base and adapted to make a locking engagement with awindow frame, an articulated locking member which is movable into aposition to secure the bolt in its frame-engaging position and includinga locking element to then engage rack means on the other sash and secureboth sashes from movement, and means on the locking member adapted toreceive the detent when the locking member is moved to an inactiveposition, whereupon said locking element is retreated from the rackmeans, thus allowing relative movement of the sashes.

"7. In a look, a base adapted to be secured on top of a sash, said basehaving an apron applicable to the front of the sash, said apron havingan extension above the base providing a detent, a bolt on the base,means embodied in the base providing a track for the bolt, a portion ofsaid means constituting hinges knuckles, a stud upstanding from aportion of said bolt, a leaf hinged to said knuckles and having anopening to receive the stud when the bolt is in its locking position,said leaf being swingable upwardly to release the stud and allowretraction of the bolt, and a hasp hinged to the leaf adapted to overliethe apron and grip the bolt in its securing position, said hasp beingswingable upwardly into a bowed position upon retraction of the bolt,and having at least one tang defining a recess to receive the detent andtemporarily support the beep and leaf in a bowed position.

8. A lock comprising a rack securable to one of a pair of window sashes,a bolt sl'idably carried by the other one of said pair of sashes andadapted to assume either of two positions in one of which it isextensible into locking contact with engageable means on a framecontaining the sashes, said engageable means being spaced up from thesill a distance greater than the height of said other sash so as tosecure said sash in a raised position, and an articulated locking memberalso carried by said other sash, said member including a rack-engagingpart adapted to engage the rack and at the same time cooperate with thebolt to retain it in one of its positions, said member also includinganother part adapted to be retained in a secured position to retain saidrack-engaging part in the securing position.

JACOB A. MUSSMAN.

